POLITEto behave as well and politely as you can in order to please someone 尽可能好地表现,尽量行为检点
I want you both to be on your best behaviour at Grandad’s.
我希望你们俩在爷爷家里乖乖的。
Examples from the Corpus
be on your best behaviour• Dinner was very formal, with everyone on their bestbehaviour.• And if what Cadfael suspected was indeed true, he had now good reason to be on his best behaviour.• But everyone is on their best behaviour.• So when we arrived hopefully at LochHope that morning, I was on my best behaviour.• Use only our own girls and warn them to be on their best behaviour.